I purchased the books years ago from: Ray Stueckle, P.O. Box 1323, Caldwell, Idaho, 83605 Ray's Company that produced Chrome Alloy Wear parts for cultivators, drills, rippers etc., and sold his books: RandH Machine, Inc. 115 Roedel Ave. Caldwell, Idaho 83605 U.S.A. 1-800-321-6568 Various publishers were used: 1978 WEBPCO Printing co. P.O. Box 2027 Wenatchee, WA 98801 1985, 1988 The Caxton Printers, ltd. Caldwell, Idoho 1984 The Malheur Publishing Co. Ontario, Oregon 97914 let me know if you can still find some copies. Good luck in your search.